Common Mistakes in Choosing Nails for Roofing in Nigeria
When building or renovating a home in Nigeria, one of the most overlooked yet critical aspects of roofing is the type of nails used.
Choosing the wrong nails can lead to leaks, weak roofing, and structural damage.
Many homeowners and even some contractors make common mistakes when selecting roofing nails, leading to costly repairs or replacements.
This guide highlights the most common mistakes people make when choosing nails for roofing in Nigeria and provides expert advice on how to avoid them.
1. Choosing the Wrong Nail Material
The material of the nail plays a crucial role in the durability of your roofing. One of the most frequent mistakes people make is selecting nails that are not resistant to rust and corrosion.
- Galvanized vs. Non-Galvanized Nails: Galvanized nails are coated with a protective zinc layer that prevents rust, making them ideal for roofing. Non-galvanized nails, on the other hand, are prone to rusting, especially in Nigeria’s humid and rainy climate.
- Stainless Steel or Aluminum Nails for Coastal Areas: If your house is located in coastal regions like Lagos, Warri, or Port Harcourt, where saltwater corrosion is high, stainless steel or aluminium nails are better. These nails offer higher resistance to corrosion than regular steel nails.
- Effects of Rust and Corrosion: When nails rust, they weaken the roof structure, leading to loose roofing sheets, leaks, and premature roof failure.
How to Avoid This Mistake:
Always choose galvanized, stainless steel, or aluminium nails, depending on your location and roofing material.
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2. Using the Wrong Nail Length and Size
Another common mistake is selecting nails that are either too short or too long for the roofing material.
- Impact of Nail Size on Roofing Strength: The length and thickness of the nail determine how well it holds the roofing sheets in place. Using nails that are too short will not provide enough grip, while nails that are too long may damage the underlying structure.
- Recommended Sizes for Different Roofing Sheets:
- Aluminum roofing sheets – 2.5 to 3 inches long
- Stone-coated roofing sheets – 3 to 3.5 inches long
- Asbestos or fiber cement sheets – 3.5 inches or longer
- Dangers of Incorrect Nail Length:
- Too short: The nails may not penetrate deep enough into the wooden purlins, leading to loose roofing sheets.
- Too long: Overly long nails may weaken the roofing structure by penetrating too deeply and causing cracks or splits.
How to Avoid This Mistake:
Consult your roofer to determine the correct nail length for your specific roofing material.
3. Not Considering the Nail Head Type
The type of nail head also matters when it comes to securing your roof properly. Many people mistakenly use smooth nails, which are less effective in holding roofing sheets in place.
- Different Types of Nail Heads:
- Smooth nails – Can loosen over time due to wind and vibration.
- Ring-shank nails – Have grooves along the shaft that provide a stronger grip, preventing the roofing sheets from shifting.
- Twisted shank nails – Offer even better grip and are ideal for areas with strong winds.
- Why Ring-Shank Nails Are Better: They prevent roofing sheets from moving or lifting during heavy winds or storms, making them ideal for Nigeria’s unpredictable weather.
How to Avoid This Mistake:
Use ring-shank or twisted shank nails for better hold and durability.
4. Poor Nail Placement and Spacing
Even if you choose the right nails, improper placement and spacing can still lead to roofing issues.
- Correct Nail Spacing:
- For corrugated aluminum roofing sheets, nails should be placed at every second or third ridge.
- For stone-coated roofing, nails should be placed along the designated nailing strip.
- Common Mistakes in Nail Placement:
- Nailing too close to the edges – This weakens the roofing sheet and makes it more prone to leaks.
- Nailing too far apart – Reduces stability and makes the roof vulnerable to wind damage.
- Overdriving or underdriving nails – If nails are driven in too deep, they can damage the sheet; if too loose, they won’t secure the roof properly.
How to Avoid This Mistake:
Follow manufacturer guidelines on nail spacing and placement. Ensure nails are driven in just enough to secure the sheet without deforming it.
5. Ignoring Roofing Type and Climate Conditions
Nigeria’s diverse climate affects the durability of roofing nails, yet many people ignore this factor when making their selection.
- Best Nail Types for Different Roofing Materials:
- Metal roofing – Use galvanized steel nails to prevent rust.
- Shingles or fiber cement sheets – Use stainless steel nails for better longevity.
- How Nigeria’s Climate Affects Nails:
- In hot regions (e.g., Kano, Maiduguri), nails may expand and contract, weakening their grip.
- In coastal areas, saltwater exposure can cause rapid corrosion.
- In rainy regions, excessive moisture can lead to rusting and leaks.
How to Avoid This Mistake:
Choose nails designed for your specific roofing material and climate.
6. Using Low-Quality or Substandard Nails
One of the biggest mistakes people make is buying cheap, low-quality nails that compromise the roof’s integrity.
- Signs of Fake or Low-Quality Nails:
- Thin or easily bendable nails.
- Nails with uneven coatings (may not be fully galvanized).
- Nails that rust quickly after exposure to rain.
- Why Cheap Nails Cost More in the Long Run:
- They fail faster, leading to frequent repairs.
- They cause roof instability, increasing the risk of storm damage.
How to Avoid This Mistake:
Buy nails from trusted suppliers and avoid extremely cheap options that compromise quality.
7. Not Consulting Roofing Experts
Many homeowners make the mistake of choosing roofing nails without expert advice. This can lead to unnecessary expenses and roof failure.
- Why Professional Advice Matters:
- Experienced roofers know the best nails for specific materials.
- Contractors understand the local climate and how it affects nails.
- Roofing experts ensure correct nail placement and spacing.
- Buying from Trusted Hardware Suppliers: Avoid roadside sellers who may stock low-quality nails and instead buy from reputable suppliers.
How to Avoid This Mistake:
Before purchasing roofing nails, consult a professional roofer or hardware expert.
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Conclusion
Choosing the right nails for roofing in Nigeria is crucial for durability, stability, and long-term cost savings.
Avoid common mistakes such as using the wrong nail material, size, or head type, and ensure proper placement and spacing. Consider Nigeria’s climate when selecting nails and always prioritize quality over cost.
By following these guidelines, you can ensure your roof remains strong and secure for many years to come.
Need expert roofing advice? Consult a professional before making your purchase.